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<br />INTRODUCTION <br /> <br />' The Colorado Yampa Coal Company Mine No. 3 is located approximately 25 miles <br />southwest of Steamboat Springs, Colorado in Twentymile Park (Figure 1). )<t <br />' was primarily a surface coal mining operation with limited underground <br />mining. The surface mine, which was active between 1974 and 1980, was <br />called Mine No. 3. An attempt was made to start an underground mine, called <br />' the Middle Creek Mine. It was faced-up in a Mine No. 3 highwall. <br />Operations began May 16, 1979, but the mine was abandoned on June 5, 1980 <br />' due to adverse mining conditions. No significant amounts of coal were <br />extracted. The Wadge coal seam was extracted at both mines._ There is_ no <br />~ ~ <br />active mining in this area and a total of approximately 296 acres were <br />' disturbed. Mine 3 straddles the confluence of Middle and-f-oi'del-Creeks. A <br />small portion of Mine No. 3 drains into Fish Creek; however, bond has been <br />released for this area. All impacts related to Fish Creek are discussed in <br />file 1987 Water Year Annual Hydrologic Report for the Fish Creek Tipple <br />t (Permit No. C-81-036). Mine No. 3 area has been backfilled, regraded, and <br />revegetated. An administrative facility located in the Mine 3 area is still <br />' used by Colorado Yampa Coal Company. County road 33 runs through the site. <br />Iydrologic monitoring has been conducted in the area since 1975. This <br />report covers the hydrologic monitoring for Water Year 1987. The previous <br />monitoring of this area was presented in the 1986 Annual Hydrologic Report. <br />Tlie hydrologic monitoring has been divided into four parts: 1) ground <br />water, 2) surface water, 3) spoil springs, and 4) effluent sites. The <br />monitoring locations are shown on Tables 2 and 3 and summarized on Table 1. <br />The parameter lists are shown on Tables 2 and 3. A complete listing of all <br />' water data collected at the monitoring sites is submitted separately. <br />Summaries of the complete data set and the 1987 data are presented on Tables <br />1 to 26 and Figures 3 to 23. <br />Most of the monitoring was conducted by a consultant, Al Miller of Steamboat <br />Springs, Colorado. Some of the sampling was conducted by mine personnel. <br />Most of the water quality analyses were performed by ACZ Laboratories <br />' (formerly Bookcliffs) of Steamboat Springs, Colorado. Prior to June, 1986 <br />some of the water quality testing was performed by the Colorado Yampa Coal <br />' ('nmpany laboratory. Two sites are monitored by the US Geologic Survey <br />(IJSGS) and the samples they collect are analyzed in their laboratory. <br />1 <br />